import Vue from '../../utils/vue';
import { isVisible, selectAll } from '../../utils/dom';
import normalizeSlotMixin from '../../mixins/normalize-slot';
import KeyCodes from '../../utils/key-codes';
var ITEM_SELECTOR = ['.btn:not(.disabled):not([disabled]):not(.dropdown-item)', '.form-control:not(.disabled):not([disabled])', 'select:not(.disabled):not([disabled])', 'input[type="checkbox"]:not(.disabled)', 'input[type="radio"]:not(.disabled)'].join(','); // @vue/component

export var BButtonToolbar =
/*#__PURE__*/
Vue.extend({
  name: 'BButtonToolbar',
  mixins: [normalizeSlotMixin],
  props: {
    justify: {
      type: Boolean,
      default: false
    },
    keyNav: {
      type: Boolean,
      default: false
    }
  },
  mounted: function mounted() {
    if (this.keyNav) {
      // Pre-set the tabindexes if the markup does not include tabindex="-1" on the toolbar items
      this.getItems();
    }
  },
  methods: {
    onFocusin: function onFocusin(evt) {
      if (evt.target === this.$el) {
        evt.preventDefault();
        evt.stopPropagation();
        this.focusFirst(evt);
      }
    },
    stop: function stop(evt) {
      evt.preventDefault();
      evt.stopPropagation();
    },
    onKeydown: function onKeydown(evt) {
      if (!this.keyNav) {
        /* istanbul ignore next: should never happen */
        return;
      }

      var key = evt.keyCode;
      var shift = evt.shiftKey;

      if (key === KeyCodes.UP || key === KeyCodes.LEFT) {
        this.stop(evt);
        shift ? this.focusFirst(evt) : this.focusPrev(evt);
      } else if (key === KeyCodes.DOWN || key === KeyCodes.RIGHT) {
        this.stop(evt);
        shift ? this.focusLast(evt) : this.focusNext(evt);
      }
    },
    setItemFocus: function setItemFocus(item) {
      item && item.focus && item.focus();
    },
    focusFirst: function focusFirst() {
      var items = this.getItems();
      this.setItemFocus(items[0]);
    },
    focusPrev: function focusPrev(evt) {
      var items = this.getItems();
      var index = items.indexOf(evt.target);

      if (index > -1) {
        items = items.slice(0, index).reverse();
        this.setItemFocus(items[0]);
      }
    },
    focusNext: function focusNext(evt) {
      var items = this.getItems();
      var index = items.indexOf(evt.target);

      if (index > -1) {
        items = items.slice(index + 1);
        this.setItemFocus(items[0]);
      }
    },
    focusLast: function focusLast() {
      var items = this.getItems().reverse();
      this.setItemFocus(items[0]);
    },
    getItems: function getItems() {
      var items = selectAll(ITEM_SELECTOR, this.$el);
      items.forEach(function (item) {
        // Ensure tabfocus is -1 on any new elements
        item.tabIndex = -1;
      });
      return items.filter(function (el) {
        return isVisible(el);
      });
    }
  },
  render: function render(h) {
    return h('div', {
      staticClass: 'btn-toolbar',
      class: {
        'justify-content-between': this.justify
      },
      attrs: {
        role: 'toolbar',
        tabindex: this.keyNav ? '0' : null
      },
      on: this.keyNav ? {
        focusin: this.onFocusin,
        keydown: this.onKeydown
      } : {}
    }, [this.normalizeSlot('default')]);
  }
});